Electronic door message system

Details Electronic door message system Electronic door message system

2000-02-18

2001-04-17

Bondade, Nanda (Department: 2912)

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Intercom

Design Patent

active

D0440548

CLAIM:
The ornamental design for a electronic door message system, as shown and described.

REFERENCES:
patent: D. 339130 (1993-09-01), Johnson
patent: D. 345040 (1994-03-01), Hollins
patent: D. 391510 (1998-03-01), Leo et al.
patent: D. 415444 (1999-10-01), Money et al.
patent: D. 426537 (2000-06-01), Swinney
patent: 4868540 (1989-09-01), Housley
patent: 5148468 (1992-09-01), Marrick et al.
patent: 5210520 (1993-05-01), Housley
patent: 5570083 (1996-10-01), Johnson
patent: 5774039 (1998-06-01), Housley
patent: 5973591 (1999-10-01), Schwartz et al.

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